[CryptoPunk]

It is extremely hard to organize a protocol change that succeeds in tampering with existing smart contacts, let alone eliminates the permissionless/neutrality guarantees of a public blockchain with significant adoption.

For a public blockchain with as large a userbase as Ethereum, a protocol change that nullifies its neutrality and permissionless-ness would be nearly impossible for any group to push through.

It's absolutely incomparable to traditional banks, with respect to the degree of resistance to interference from governments.